TISSUES AND SIMPLE ORGANS. 



47 



but also cap-segments for the "root-cap" These root-cap segments 

 are the result of partition-walls formed parallel to the distal surface of 

 the apical cell, as shown in Fig. 29. (In this branch of anatomy 



Tfi 



n *- 



3-4 3 



b 



I h 



2 



1 



2 

 2T 



2 



1 



2 



J h 



2\r 



i 



FIG. 26 I. 



FIG. 26 II a. 



2 J 

 FIG. 26 II b. 



FIG. 27 I a. 



FIG. 38 c. FIG. 29. 



extensive researches have been made by NAGELI, SCHWENDENEK, and 

 LEITGEB.) Other types of root-growth will be considered later. 



